culver



L. A. CULVER.

'TELEGRAPHERS INSTRUMENT.

APPLICATLON FILED JULY 26.1916- RENEWED APR-15.1919.

Patented Dec. 9, 1919.

2 SHEETS-SHEET INVENTOR ATTORNEY L. A. CULVER.

TELEGHAPHERS INSTRUMENT.

lLED JULY 26 1916. RENEWED APR APPLICATION F I 16, 1919. 1,324,104.Patented Dec. 9,1919.

2 EEEEEEEEEEEE 2.

7 having for its otherswhich will: appear as proceeds, the ,lIlVelltloliresides in the novel. formation, combination and arrangement of rarnnrOFFICE.

rntncnnrnnns INSTRUMENT.

Application filed. July 26, 1916, Serial No. 111,517.

Toall whom it may 00mm .1 j 1 Be it known that I, LAWRENCE A. German, acitizen oft-he United States, residing at New, Yorlnin the county. ofNew York and State of New York, have invented certain new and usefulImprovements in Telegraphers Instruments, of which the followings aspecification.

Thisinvention relates to mechanical-electric mechanism for producing andtransmitting dots. and dashes of a telegraph code, primary object toprovidea vibrator capablewhen operated in one way, oi producing the dotsof the code automat ically,.and when actuated in another manneroiproducing the dashes of the code.

A particular advantage of the device to be! hereafter detailed is toprovide means whereby great speed in transmitting or sendingcode signalsmay be attained, as against, a limited low speed of the mechanicalsending machines now in use.

A further object of the invention is to providea device of thischaracter which is composed of different parts so arranged as to bereadily and minutely adjusted to regulate the speed of the device, andwhich is adaptable to the heaviest kinds of. code transmission.

With these objects in view, together with the description parts,..all aswill be described more fully hereinafter, illustrated in the drawings,and particularly pointed out in the claim.

The invention will be best understood by reference to the accompanyingdrawings, wherein Figure 1 is a side elevation of a signal producingdevice constructedin accordance with the invention;

Fig. 2 is a plan view of the device shown in Fig. 1;

Fig. 3 is a sectional view 33 of Fig. 1'; and

Fig. 4c is a diagrammatic view illustrating the manner in which thedevice is associated with the various electric circuits.

The invention comprehends broadly the arrangement of a finger leverwhich, when moved in one direction, actuates the mechanism for producingdots, while, when moved in an opposite direction, the dashes of the codeare produced.

In the attainment oi these ends, electrotaken upon line Specification ofLetters Patent.

Patented Dec. 9, 1919. Renewed April 16, 1912:. Serial No. 290,636.

magnets 5 are employed, and an armature 6 is pivoted as at 7 upon asuitable post or standard 8 ad acent the said electromagnet.

A cont actile spring 9 is arranged between the standard and thevibratory armature 6 in such manner as to normally maintainthe saidarmature out of contact with the-electromagnets.

The free end of the armature 6 extends beyond. the magnets, andisprovided preferably upon its under face with a contact point 10. A post11 is arranged adjacent the said end of the armature, and provides atable 12 upon which a fixed contact 13 is arranged, and with which thecontact 10 of the armature is adapted to engage when the said armatureis moved in one direction. The armature end constitutes one terminal ofthe sending circuit or relay, while the fixed contact 13 constitutes theother terminal, and it is apparent that as the contacts 10 and 13 areengaged, the sending circuit will be closed.

The mechanism for controlling the vibrations of the armature 6 forproducing the dots and dashes ofthe code, comprises a finger leverla,pivoted for lateral oscillatory movement as at 15, and which is providedwith. finger grips 16. This lever is supported by the bracket orstandard 17, the latter being provided with spaced contacts 18 and 19,between which the inner end of the lever llis positioned. The said lever14 is equipped with contact members 20, which are adapted uponoscillatory movement being delivered to the lever to contact alternatelywith the fixed contacts 18 and 19. To maintain the lever 1 1 normallyspaced equi-distant between thecontacts 18 and 19, expansion springs 21are employed, the tension of the said springs being varied by theprojecting screw members 22. The fixed contacts are also capable ofbeing adjusted toward and away from the contact members 20 on the lever14:, whereby the throw of the lever 1 1 may be minutely regulated.

Connected at one end to the contact 1nember 19 is a conductor or wire23, the opposite end of the same being secured to a binding post 24 uponan arm 25 projecting outwardly from the standard 8 above the armature 6.This binding post extends through the arm as shown, and is adapted to beengaged by a contact plate 25 carried by the said armature when thelatter is at the limit of its tion that one of the contacts carriedthereby engages with the termiml 19, an electric circuit through thewire 23, contact plate 25, wire 26, magnets 5, wire 27, battery 28 willbe completed in the lever 14:. Owing to the arrangement of the magnets5, armature 6 and plate 25 carried thereby, and the spring 9, thecircuit is interrupted, and vibratory movement is delivered to thearmatur 6. This movement operates through the contacts 10 and 13 toproduce in the relay or sounding circuit wires 40 a series of intervaledcontacts, whereby the dots in the telegraphic code are produced. Uponmovement of the lever 1d into a position to contact one 01": the members20 with the terminal or contact 18, a circuit will be completed throughthe wire 29, conductor 26, electromagnets wire 2?, battery 28, and lever14. T he electromagnets being thus energized draw the armature 6 untilthe contact 10 carried thereby engages with the contact 13 upon thetable 12, whereupon the circuit in the relay is closed, remaining sovuntil the contacts 20, 18 are disengaged. This opera tion produces thedashes of the signaling code.

The speed olvibration of the armature is regulated by adjustment of thecontact post 24:, by adjusting an armature stop 31, and by regulatingthe tension of the contractile spring 9. By this arrangement it isobvious that the speed at which the dots and dashes of the code are mademay be minutely regulated.

While the above is a description of the preferred embodiment of theinvention, it is obvious that various changes in the minor of saidstandard and insulated from the latter, an adjusting screw threadedthrough said portion and adapted to move toward or away from saidarmature, a spring contact plate connected at one end to said armatureand having at its free end disposed beneath said screw, a springnormally holding the said contact engaged with. said screw, a postadjacent the outer end of said armature, a table supported by said postand being poltioned beneath the free end of the said armature, a contactscrew on said post abovesaid armature adapted to be engaged by thelatter, a contact on said table adapted to be engaged by the free end ofthe armature when the latter moves downwardly, the end of said armaturewhich engages the said contact screw and contact being insulated fromthe body thereof, the said contact and contac screw being the terminalsoi a sending circuit, a laterally movable key, contacts adapted to beengaged alternately by the movements of said key, an electric circuitincluding one end or" said key, said electromagnet and the pivoted endof said armature, a wire connected at one end to said circuit and beingadapted to be engaged at its opposite end by said key when the latter ismoved in one direction, and a second wire adapted to be engaged at oneend when the key is moved in the opposite direction and being connectedat its opposite end with said adjusting screw. o

in testimony whereof I aflix my signature in presence of two witnesses.

LAJVRENCE ASBURY CULVEIR. Witnesses J. CHRISTIANSON, V L. M. BARKER. "Y1

